WRB · Insider Trading
W.R. Berkley Corporation
Every open-market purchase and sale reported by WRB officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-05 | William R Berkley Jr | Chairman, President and CEO | MIXED | +94,454 | −$299.20K |
| 2026-08-05 | Philip S Welt | EVP & Secretary | MIXED | +13,494 | −$42.79K |
| 2026-08-05 | Richard Mark Baio | EVP & CFO | MIXED | +13,436 | −$46.99K |
| 2026-08-05 | James G Shiel | EVP - Investments | MIXED | +13,436 | −$46.99K |
| 2026-06-04 | Jonathan Talisman | Director | A | +3,090 | — |
| 2026-06-04 | Ronald E Blaylock | Director | A | +3,090 | — |
| 2026-06-04 | Christopher L Augostini | Director | A | +3,090 | — |
| 2026-06-04 | Robert Alan Rusbuldt | Director | A | +3,090 | — |
| 2026-06-04 | Mary C Farrell | Director | A | +3,090 | — |
| 2026-06-04 | Daniel Lynn Mosley | Director | A | +3,090 | — |
| 2026-06-04 | William R Berkley Jr | President and CEO | A | +3,090 | — |
| 2026-06-04 | Marie Angela Mattson | Director | A | +3,090 | — |
| 2026-06-04 | Maria Luisa Ferre | Director | A | +3,090 | — |
| 2026-06-04 | William R Berkley | Executive Chairman | A | +3,090 | — |
| 2026-03-03 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +516,352 | +$37.49M |
| 2026-02-27 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +600,000 | +$42.99M |
| 2026-02-25 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,107,308 | +$78.76M |
| 2026-02-20 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,011,164 | +$71.49M |
| 2026-02-18 | MITSUI SUMITOMO INSURANCE CO LTD | 10%+ Owner | Buy | +1,132,772 | +$80.33M |
| 2026-02-13 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +80,000 | +$5.67M |
| 2026-02-11 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +195,992 | +$13.66M |
| 2026-02-06 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +80,000 | +$5.67M |
| 2026-02-04 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +630,442 | +$42.90M |
| 2026-01-30 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +970,000 | +$66.17M |
| 2026-01-28 | MITSUI SUMITOMO INSURANCE CO LTD | 10%+ Owner | Buy | +2,057,862 | +$138.60M |
| 2026-01-23 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,396,000 | +$93.80M |
| 2026-01-21 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,260,000 | +$85.22M |
| 2026-01-16 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,070,000 | +$73.29M |
| 2026-01-14 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,622,082 | +$111.25M |
| 2026-01-09 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +940,000 | +$65.28M |
| 2026-01-07 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,362,436 | +$94.83M |
| 2026-01-02 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,345,468 | +$94.33M |
| 2025-12-29 | MITSUI SUMITOMO INSURANCE CO LTD | 10%+ Owner | Buy | +1,759,146 | +$124.08M |
| 2025-12-22 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | +1,220,700 | +$85.10M |
| 2025-12-19 | James G Shiel | EVP - Investments | G | −1,250 | — |
| 2025-08-19 | William R Berkley | Executive Chairman | MIXED | +107,592 | −$304.67K |
| 2025-08-19 | William R Berkley Jr | President and CEO | MIXED | +107,173 | −$334.52K |
| 2025-08-19 | Richard Mark Baio | EVP & CFO | MIXED | +15,382 | −$53.00K |
| 2025-08-19 | Philip S Welt | EVP & Secretary | MIXED | +15,448 | −$48.30K |
| 2025-08-19 | Lucille T Sgaglione | EVP | MIXED | +15,409 | −$51.08K |
| 2025-08-19 | James G Shiel | EVP - Investments | MIXED | +15,382 | −$53.00K |
| 2025-06-13 | Robert Alan Rusbuldt | Director | A | +2,776 | — |
| 2025-06-13 | Christopher L Augostini | Director | A | +2,776 | — |
| 2025-06-13 | Ronald E Blaylock | Director | A | +2,776 | — |
| 2025-06-13 | William R Berkley Jr | President and CEO | A | +2,776 | — |
| 2025-06-13 | Mary C Farrell | Director | A | +2,776 | — |
| 2025-06-13 | Jonathan Talisman | Director | A | +2,776 | — |
| 2025-06-13 | Maria Luisa Ferre | Director | A | +2,776 | — |
| 2025-06-13 | Marie Angela Mattson | Director | A | +2,776 | — |
| 2025-06-13 | Daniel Lynn Mosley | Director | A | +2,776 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | 58,567,377 | $4.34B |
| MITSUI SUMITOMO INSURANCE CO LTD | 10%+ Owner | 56,878,038 | $4.21B |
| William R Berkley | Executive Chairman | 18,716,375 | $1.39B |
| William R Berkley Jr | Chairman, President and CEO | 8,203,800 | $607.74M |
| James G Shiel | EVP - Investments | 1,019,283 | $75.51M |
| Lucille T Sgaglione | EVP | 249,784 | $18.50M |
| Richard Mark Baio | EVP & CFO | 249,678 | $18.50M |
| Philip S Welt | EVP & Secretary | 239,764 | $17.76M |
| Maria Luisa Ferre | Director | 224,045 | $16.60M |
| Mary C Farrell | Director | 160,484 | $11.89M |
| Ronald E Blaylock | Director | 147,943 | $10.96M |
| Christopher L Augostini | Director | 109,859 | $8.14M |
| Jonathan Talisman | Director | 34,035 | $2.52M |
| Daniel Lynn Mosley | Director | 14,885 | $1.10M |
| Marie Angela Mattson | Director | 9,667 | $716.13K |
| Robert Alan Rusbuldt | Director | 5,866 | $434.55K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the WRB quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.